CN105937875B - A kind of dynamic clearance measuring instrument and its measurement method - Google Patents
A kind of dynamic clearance measuring instrument and its measurement method Download PDFInfo
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- CN105937875B CN105937875B CN201610505130.XA CN201610505130A CN105937875B CN 105937875 B CN105937875 B CN 105937875B CN 201610505130 A CN201610505130 A CN 201610505130A CN 105937875 B CN105937875 B CN 105937875B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
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Abstract
A kind of dynamic clearance measuring instrument and its measurement method, dynamic clearance measuring instrument includes gap probe (4), Drive assembly and displacement measurement component, the Drive assembly includes vibrator (6), vibrator fixed link (7) and vibration control ring (5), the vibrator (6) is located on the vibrator fixed link (7), institute's displacement measurement component includes eddy current displacement sensor (3) and displacement sensor fixed link (2), the gap probe (4) for measurement gap is set among vibration control ring (5), vibration control ring (5) the connection vibrator (6) is so that the vibratory response of vibrator (6) is transmitted to gap probe (4), the eddy current displacement sensor (3) being located in displacement sensor fixed link (2) measures the dynamic respond of the gap probe (4).
Description
Technical field
The invention belongs to fields of measurement, more particularly to a kind of dynamic clearance measuring instrument and its measurement method.
Background technology
In mechanical structure, due to the demand assembled and lubricated, inevitably there is gap between each component faying face.
Due to the presence in faying face gap, under the action of external force and moment of face, bonded block opposed attachment surfaces will produce offset, this
Offset also inevitably results in structure member and generates offset relative to ideal position, so as to cause the decline of response accuracy.In addition, by
The influence of the factors such as the abrasion, fuel factor and the local deformation that are generated in motion process, gap width will gradually increase, to constantly
Ground changes the stressing conditions between component, causes to wear aggravation between component, while will produce harsh noise, seriously affects system
Kinematic accuracy and stability, so that the power performance of mechanical structure declines.It is different that gap width measurement can aid in understanding
The action rule of system under gap provides basis with elimination by the system deviation that gap induces in order to control.Therefore, gap width is studied
Measurement, especially dynamic clearance value monitoring have practical significance.People have invented the structure and mode of a series of exquisitenesses
Carry out the size of measurement gap value.For example, the combination using gap clearance gauge can accurate measurement gap value；Utilize the side of image processing
Formula can easily measurement gap value size；Even there is the digital vernier clearance ruler of some electronic types now.
It is more to be presently used for clearance measurement mode, however main gap measuring apparatus and mode have following deficiency：Gap
Clearance gauge combination operation is complicated, error can be brought during combination, and measurement accuracy can be by artificial subjective factor and material category
The influence of property；The mode precision of image processing is poor, and can only measuring mechanism gap outer gap width；Digital vernier clearance ruler
Due to the limitation of measurement head thickness, the accurate measurement of minim gap value cannot achieve.
A kind of digital vernier clearance ruler disclosed in patent document CN104359378 A includes vernier scale component, pressure measurement
Component, attachment device, the number clearance ruler component includes vernier (2), main scale (1), trip bolt (3)；The pressure measurement
Component includes pressure sensor (6), distance rod (8), linear bearing (5), fastening bolt (7)；The attachment device includes tiltedly connecting
Extension bar (4), pin (9), master link (10), connection bolt (11).The patent, as main scale is measured, is passed through using vernier caliper
Attachment device amplifies the micro-displacement of distance rod, realizes the accurate measurement of minim gap value.But the patent is due to self structure
Limitation, cannot achieve the measurement of small space internal clearance value.
Disclosed in patent document CN204064527U it is a kind of based on current vortex relative displacement measure Shaft Torque survey online
Trial assembly is set including tested shaft, left and right snap ring, Auxiliary support, displacement measurement arm, reference arm, damping-constraining device, current vortex displacement
Sensor and measuring circuit；Left and right snap ring is individually fixed in the both ends of tested axis of walking around, and Auxiliary support is located at left and right snap ring two
Person centre position is installed in tested shaft；The butt end of displacement measurement arm and reference arm is turned by left and right snap ring with tested respectively
Axis connects firmly, and is rotated together with shaft；The other end taper end of displacement measurement arm and reference arm is freely placed in Auxiliary support, is become
Free end, when static, displacement measurement arm and reference arm are parallel to each other, and are parallel to survey simultaneously and turn shaft axis；Displacement measurement arm
Free end face reflective electric vortex displacement sensor is installed on reference arm, the free end face of reference arm is at displacement measurement arm
Copper induction disk is installed, the reference point to eddy displacement sensor is formed；In the free end of displacement measurement arm and reference arm
Outside is separately connected identical damping-constraining device, and the shell of damping-constraining device is fixed in Auxiliary support, current vortex displacement sensing
Device is mounted on the free end of displacement measurement arm, and the opposite reference point for measuring displacement is constituted with reference arm free end；Measuring circuit is solid
Be scheduled in tested shaft, output drive to eddy current sensor, eddy current sensor signals are input to measuring circuit, measuring circuit according to
Acquisition signal calculates real-time torque load data.The patent is suitble to the high-precision of the small torsional deflection of large-diameter size to survey
Examination, but the patent cannot achieve the accurate measurement of minim gap value.
A kind of detection method of hydraulic pressure counter-blow hammer tup displacement disclosed in patent document CN103017647A is by hydraulic pressure pair
Hammer tup side vertical direction engraves groove scale, using being fixed on the rack and the detection sensor sense of face groove scale
Tup groove is answered to move, when groove enters eddy current displacement sensor induction region, detection sensor exports one with displacement
The voltage signal for measuring consecutive variations, by detecting the voltage signal of output in real time and being calculated, during determining that tup is hit
Displacement；The specific steps are：1) it is engraved in hydraulic pressure counter-blow hammer tup side vertical direction multiple equidistant and equal-sized recessed
Slot, detection sensor is installed in the position of face groove scale in counter-blow hammer rack, is separately mounted to pass through when upper and lower tup strike
The position crossed；2) start hydraulic pressure counter-blow hammer, upper lower ram is done to hitting movement, when two tups are sensed by corresponding detection respectively
When device, detection sensor senses that tup upper groove scale, eddy current displacement sensor export the voltage signal of consecutive variations；3)
The voltage signal of acquisition is transmitted to host computer and handled by data collecting card.The patent can detect counter-blow hammer tup in real time
Displacement, but the patent cannot achieve the accurate measurement of minim gap value.
Therefore, urgent need technical problems to be solved in this field are that having overcome the deficiencies of the prior art and provide one kind is used for
Accurate measurement gap value and the dynamic clearance measuring instrument for monitoring gap width dynamic change.
Disclosed above- mentioned information is used only for enhancing the understanding to background of the present invention in the background section, it is thus possible to
Including in not constituting home the prior art known to a person of ordinary skill in the art information.
Invention content
The purpose of the present invention is be achieved by the following technical programs.
According to an aspect of the present invention, a kind of dynamic clearance measuring instrument includes gap probe, Drive assembly and displacement measurement
Component, the Drive assembly include vibrator, vibrator fixed link and vibration control ring, and the vibrator is located at the vibrator
In fixed link, institute's displacement measurement component includes eddy current displacement sensor and displacement sensor fixed link, is used for measurement gap
The gap probe be set among vibration control ring, vibration control ring connection vibrator makes the vibration of vibrator ring
It should be transmitted to gap probe, the eddy current displacement sensor being located in displacement sensor fixed link measures the position of the gap probe
Move response.
Preferably, the dynamic clearance measuring instrument is equipped with processor, and the processor is based on coming from two current vortexs
The dynamic respond of displacement sensor and vibratory response from the vibrator are handled.
Preferably, the processor is based on following formula calculated gap value,
Wherein, Xi (w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors are surveyed respectively
Dynamic respond between the dynamic respond and gap probe and surveyed gap of amount, HLIndicate the frequency response function of gap probe (4),
F (ω) indicates the exciting force of vibrator, Fnl(ω) indicates the non-linear force in surveyed gap.
Preferably, the dynamic clearance measuring instrument be equipped with support component and pedestal, the support component include supporting rack and
Supporting rack fastening bolt, support frame as described above lower part are equipped with via supporting rack fastening bolt connect base, the pedestal for moving
Dynamic and fixing support rack inverted T shaped groove.
Preferably, the dynamic clearance measuring instrument be equipped with probe adjusting part, the probe adjusting part include rocker and
Spin-ended bolt, the rocker left and right ends are bolted support frame as described above via spin-ended；The spiral shell that the gap probe passes through tail end
Line connects the rocker, and institute's displacement sensors fixed link rear end connects the rocker, and the vibrator fixes rod rear end connection
The rocker.
Preferably, the rotatable rocker via spin-ended bolt fix rotation angle so that gap probe be inserted into gap,
And make between the gap probe and the both sides in gap that there are gaps.
Preferably, the gap probe is with different-diameter and the vibration control ring is with corresponding different inner diameters.
Preferably, rocker is located at by the boss at both ends on support frame as described above.
According to another aspect of the present invention, a kind of use according to the measurement method of the dynamic clearance measuring instrument include with
Lower step.
In first step, according to surveyed Interval selecting diameter gap probe appropriate and corresponding vibration control ring, use
Among the gap probe of measurement gap is set in the vibration control ring.
In second step, the position of supporting rack and the angle of rocker are adjusted and by supporting rack fixing bolt and spin-ended
Bolt is fixed so that gap probe is inserted into surveyed gap and there are gaps between the both sides in surveyed gap.
In third step, vibrator is opened, two eddy current displacement sensors being located in displacement sensor fixed link are surveyed
Measure the dynamic respond of the gap probe.
Preferably, in third step, the processor is based on the dynamic respond from the eddy current displacement sensor
It is handled with the vibratory response from the vibrator, the processor is based on following formula calculated gap value and draws gap
Non-linear force-displacement curve,
Wherein, Xi (w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors are surveyed respectively
Dynamic respond between the dynamic respond and gap probe and surveyed gap of amount, HLIndicate the frequency response function of gap probe (4),
F (ω) indicates the exciting force of vibrator, Fnl(ω) indicates the non-linear force in surveyed gap.
The present invention has the advantages that and significant progress：
1) the dynamic clearance measuring instrument realizes the measurement of gap width by gap probe, simple in structure easy to process.
2) the dynamic clearance measuring instrument can realize that the gap width of different size different location measures, simple to operate.
3) the dynamic clearance measuring instrument can realize the real-time monitoring of Mechanism Clearance value dynamic change.
4) the dynamic clearance measuring instrument need not carry out stack combinations complicated for operation compared with the clearance gauge of gap, measure knot
Fruit is not influenced by artificial subjective factor and measurand material properties.
5) the dynamic clearance measuring instrument can measure the opened gap there are certain depth compared with image processing method
Internal clearance Distribution value.
6) the dynamic clearance measuring instrument is compared with digital vernier clearance ruler, do not influenced by measurement head thickness, it can be achieved that
The measurement of minim gap value.
7) for the dynamic clearance measuring instrument compared with digital clearance ruler, gap probe structure is small and exquisite, it can be achieved that small space
The measurement of internal clearance value.
8) compact-sized, versatile, and process and assemble is easy, is easy to operate.
Above description is only the general introduction of technical solution of the present invention, in order to make the technological means of the present invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be clearer and more comprehensible, below with the present invention specific implementation mode illustrate
Explanation.
Description of the drawings
By reading the detailed description in hereafter preferred embodiment, the present invention various other advantage and benefit
Those of ordinary skill in the art will become clear, Figure of description only for the purpose of illustrating preferred embodiments,
And it is not considered as limitation of the present invention, it should be apparent that, drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings, and throughout the drawings, identical component is presented with like reference characters；
In the accompanying drawings：
Fig. 1 is the structural schematic diagram of dynamic clearance measuring instrument according to an embodiment of the invention；
Fig. 2 is the structural schematic diagram of dynamic clearance measuring instrument in accordance with another embodiment of the present invention；
Fig. 3 is the step schematic diagram of measurement method according to an embodiment of the invention；
The corresponding component names of reference numeral：1 pedestal；2 displacement sensor fixed links；3 eddy current displacement sensors；Between 4
Gap probe；5 vibration control rings；6 vibrators；7 vibrator fixed links；8 rockers；9 supporting racks；10 spin-ended bolts；11 supporting racks are tight
Fixing bolt；
The present invention is further explained below in conjunction with drawings and examples.
Specific implementation mode
Specific embodiments of the present invention are more fully described below with reference to accompanying drawings.Although showing the present invention's in attached drawing
Specific embodiment, it being understood, however, that may be realized in various forms the present invention without should be limited by embodiments set forth here
System.It is to be able to be best understood from the present invention on the contrary, providing these embodiments, and can be complete by the scope of the present invention
Be communicated to those skilled in the art.
It should be noted that having used some vocabulary in specification and claim to censure specific components.Ability
Field technique personnel it would be appreciated that, technical staff may call the same component with different nouns.This specification and right
It is required that not in such a way that the difference of noun is used as and distinguishes component, but differentiation is used as with the difference of component functionally
Criterion."comprising" or " comprising " as mentioned in working as in specification in the whole text and claim are an open language, therefore should be solved
It is interpreted into " including but not limited to ".Specification subsequent descriptions be implement the present invention better embodiment, so it is described description be with
For the purpose of the rule of specification, it is not limited to the scope of the present invention.Protection scope of the present invention is when regarding appended right
It is required that subject to institute's defender.
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with attached drawing
Explanation, and each attached drawing does not constitute the restriction to the embodiment of the present invention.
Fig. 1 is the structural schematic diagram of the dynamic clearance measuring instrument of one embodiment of the present of invention, and the embodiment of the present invention will be tied
Fig. 1 is closed to be specifically described.
As shown in Figure 1, An embodiment provides a kind of dynamic clearance measuring instrument, a kind of dynamic clearance measurement
Instrument comprising gap probe 4, Drive assembly and displacement measurement component, the Drive assembly include that vibrator 6, vibrator are fixed
Bar 7 and vibration control ring 5, the vibrator 6 are located in the vibrator fixed link 7, and institute's displacement measurement component includes electric whirlpool
Stream displacement sensor 3 and displacement sensor fixed link 2, the gap probe 4 for measurement gap are set in vibration control ring 5
Among, the vibration control ring 5 connects vibrator 6 and the vibratory response of vibrator 6 is made to be transmitted to gap probe 4, is located at displacement
Two eddy current displacement sensors 3 in sensor fixed link 2 measure the dynamic respond of the gap probe 4.By between insertion
The measurement of the dynamic respond implementation mechanism internal clearance value of gap probe 4 at gap position.
The embodiment of the present invention is preferably, and the dynamic clearance measuring instrument is equipped with processor, and the processor is based on coming from
The dynamic respond of two eddy current displacement sensors 3 and the vibratory response from the vibrator 6 are handled.Two institutes
Eddy current displacement sensor 3 is stated to the dynamic respond of two different locations of measurement gap probe 4, is rung according to the displacement measured
Backlash characteristics should be utilized to realize the accurate measurement of gap width.
In one embodiment, the processor is based on following formula calculated gap value,
Wherein, Xi(w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors are surveyed respectively
Dynamic respond between the dynamic respond and gap probe and surveyed gap of amount, HLIndicate the frequency response function of gap probe 4, F
(ω) indicates the exciting force of vibrator 6, Fnl(ω) indicates the non-linear force in surveyed gap.Therefore gap spy can be sought by formula 1
The dynamic respond X of needle 4 and measured gap contact end4(ω) and suffered backlash nonlinearity power Fnl(ω)；Pass through Fourier's inversion
Change commanders X4(ω) and Fnl(ω) is transformed into time domain, then draws backlash nonlinearity force-displacement curve, linear in three, curve two
The distance between inflection point is surveyed gap width along with the diameter of gap probe.
In embodiments of the present invention preferably, processor is compileable, organizes or analyze data.Processor may include general
Processor, digital signal processor, application-specific integrated circuit ASIC, on-site programmable gate array FPGA, analog circuit, number electricity
Road, and combinations thereof or processor that oneself know or develop later other.Processor may include memory, which can be easy
The property lost memory or nonvolatile memory.Memory may include one or more read only memory ROMs, random access memory
Device RAM, flash memory, Electrical Erasable programmable read only memory EEPROM or other types of memories.
Fig. 2 is the structural schematic diagram of the dynamic clearance measuring instrument of one embodiment of the present of invention, and the embodiment of the present invention will be tied
Fig. 2 is closed to be specifically described.
As shown in Fig. 2, An embodiment provides a kind of dynamic clearance measuring instrument, a kind of dynamic clearance measurement
Instrument comprising gap probe 4, Drive assembly, displacement measurement component, the Drive assembly include vibrator 6, vibrator fixed link
7 and vibration control ring 5, the vibrator 6 be located in the vibrator fixed link 7, institute's displacement measurement component includes current vortex
Displacement sensor 3 and displacement sensor fixed link 2, the gap probe 4 for measurement gap be set in vibration control ring 5 it
In, the vibration control ring 5 connects vibrator 6 and the vibratory response of vibrator 6 is made to be transmitted to gap probe 4, is located at displacement biography
Two eddy current displacement sensors 3 in sensor fixed link 2 measure the dynamic respond of the gap probe 4, the dynamic clearance
Measuring instrument is equipped with support component and pedestal 1, and the support component includes supporting rack 9 and supporting rack fastening bolt 11, the support
9 lower part of frame via 11 connect base 1 of supporting rack fastening bolt, the pedestal 1 be equipped with for it is mobile and fixing support rack 9 fall
T-slot.
The embodiment of the present invention is preferably, and the dynamic clearance measuring instrument is equipped with probe adjusting part, and the probe is adjusted
Component includes rocker 8 and spin-ended bolt 10, and 8 left and right ends of the rocker connect support frame as described above 9 via spin-ended bolt 10；It is described
Gap probe 4 connects the rocker 8 by the threaded connection rocker 8 of tail end, 2 rear end of institute's displacement sensors fixed link,
7 rear end of vibrator fixed link connects the rocker 8.
The embodiment of the present invention is preferably, and the rotatable rocker 8 fixes rotation angle via the spin-ended bolt 10
So that gap probe 4 is inserted into gap, and make between the gap probe 4 and the both sides in gap that there are gaps.
The embodiment of the present invention is preferably, and the gap probe 4 is with different-diameter and the vibration control ring 5 is with phase
The different inner diameters answered can greatly extend clearance measurement range by the gap probe 4 of different-diameter, realize minim gap value
It measures.
The embodiment of the present invention is preferably, and institute's displacement measurement component includes more than two eddy current displacement sensors 3,
Rocker 8 is located at by the boss at both ends on support frame as described above 9.
Preferably, the vibration information of surveyed gap probe 4 can be passed through data line by the eddy current displacement sensor 3
It is transferred to data acquisition equipment, and is handled gathered data by computer, to realize digitized measurement.
Preferably, the dynamic clearance measuring instrument can measure the internal clearance value point of the opened gap there are certain depth
Cloth, while can be to the gap width Monitoring on Dynamic Change in implementation mechanism gap.
Referring to Fig. 3, the measurement method according to an embodiment of the invention using the dynamic clearance measuring instrument includes
Following steps.
In first step S1, according to surveyed Interval selecting diameter gap probe 4 appropriate and corresponding vibration control ring
5, the gap probe 4 for measurement gap is set among the vibration control ring 5.
In second step S2, adjust supporting rack 9 position and rocker 8 angle and by supporting rack fixing bolt 11 with
And spin-ended bolt 10 is fixed so that gap probe 4 is inserted into surveyed gap and there are gaps between the both sides in surveyed gap.
In third step S3, vibrator 6 is opened, the two current vortex displacements sensing being located in displacement sensor fixed link 2
Device 3 measures the dynamic respond of the gap probe 4.Eddy current displacement sensor 3 can external data collecting device.
The embodiment of the present invention is preferably, and in third step S3, the processor is based on coming from the current vortex displacement
The dynamic respond of sensor 3 and vibratory response from the vibrator 6 are handled, and the processor is based on following formula meter
It calculates gap width and draws backlash nonlinearity force-displacement curve,
Wherein, Xi(w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors are surveyed respectively
Dynamic respond between the dynamic respond and gap probe and surveyed gap of amount, HLIndicate the frequency response function of gap probe 4, F
(ω) indicates the exciting force of vibrator 6, Fnl(ω) indicates the non-linear force in surveyed gap.It is set by the data acquisition of such as processor
The measured value x of standby acquisition eddy current displacement sensor 32(t) and x3(t)；Measured displacement response is transformed by Fourier transformation
Frequency domain X2(ω) and X3It (ω) and substitutes into formula 1, indicates frequency response function H of the gap probe at above-mentioned positionLIt can pass through in advance
Experiment measures, therefore the dynamic respond X of gap probe 4 and measured gap contact end can be sought by formula 14(ω) and it is suffered between
Gap non-linear force Fnl(ω)；By inverse Fourier transform by X4(ω) and Fnl(ω) is transformed into time domain, and it is non-thread then to draw gap
Property force-displacement curve, linear in three, the distance between two inflection point of curve is surveyed gap along with the diameter of gap probe
Value.
Although embodiment of the present invention is described above in association with attached drawing, the invention is not limited in above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art are under the enlightenment of this specification and in the range for not departing from the claims in the present invention and being protected
In the case of, a variety of forms can also be made, these belong to the row of protection of the invention.
Claims (10)
1. a kind of dynamic clearance measuring instrument comprising gap probe (4), Drive assembly and displacement measurement component, the excitation group
Part includes vibrator (6), vibrator fixed link (7) and vibration control ring (5), and it is solid that the vibrator (6) is located at the vibrator
In fixed pole (7), institute's displacement measurement component includes eddy current displacement sensor (3) and displacement sensor fixed link (2), feature
It is：Among the gap probe (4) for measurement gap is set in vibration control ring (5), the vibration control ring (5) is even
Vibrator (6) is connect so that the vibratory response of vibrator (6) is transmitted to gap probe (4), is located in displacement sensor fixed link (2)
Eddy current displacement sensor (3) measure the dynamic respond of the gap probe (4), the dynamic clearance measuring instrument is equipped with processing
Device.
2. dynamic clearance measuring instrument according to claim 1, it is characterised in that：The processor is based on from described in two
The dynamic respond of eddy current displacement sensor (3) and the vibratory response for coming from the vibrator (6) are handled.
3. dynamic clearance measuring instrument according to claim 2, it is characterised in that：The processor is calculated based on following formula
Gap width,
Wherein, Xi(w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors measure respectively
Dynamic respond between dynamic respond and gap probe and surveyed gap, HLIndicate the frequency response function of gap probe (4), F
(ω) indicates the exciting force of vibrator (6), Fnl(ω) indicates the non-linear force in surveyed gap.
4. dynamic clearance measuring instrument according to claim 1, it is characterised in that：The dynamic clearance measuring instrument is equipped with support
Component and pedestal (1), the support component include supporting rack (9) and supporting rack fastening bolt (11), support frame as described above (9) lower part
Via supporting rack fastening bolt (11) connect base (1), the pedestal (1) is equipped with for mobile and fixing support rack (9)
Inverted T shaped groove.
5. dynamic clearance measuring instrument according to claim 4, it is characterised in that：The dynamic clearance measuring instrument is equipped with probe
Adjusting part, the probe adjusting part include rocker (8) and spin-ended bolt (10), and rocker (8) left and right ends are via only
It revolves bolt (10) and connects support frame as described above (9)；The gap probe (4) is described by the threaded connection rocker (8) of tail end
Displacement sensor fixed link (2) rear end connects the rocker (8), and vibrator fixed link (7) rear end connects the rocker
(8)。
6. dynamic clearance measuring instrument according to claim 5, it is characterised in that：The rotatable rocker (8) is via institute
The fixed rotation angle of spin-ended bolt (10) is stated so that gap probe (4) is inserted into gap, and makes the gap probe (4) and gap
There are gaps between both sides.
7. dynamic clearance measuring instrument according to claim 1, it is characterised in that：The gap probe (4) has different straight
Diameter and the vibration control ring (5) have corresponding different inner diameters.
8. dynamic clearance measuring instrument according to claim 5, it is characterised in that：Rocker (8) is located at by the boss at both ends
On support frame as described above (9).
9. a kind of measurement method of dynamic clearance measuring instrument of use according to any one of claim 1-8 comprising with
Lower step：
In first step (S1), according to surveyed Interval selecting diameter gap probe (4) appropriate and corresponding vibration control ring
(5), the gap probe (4) for being used for measurement gap is set among the vibration control ring (5)；
In second step (S2), adjusts the position of supporting rack (9) and the angle of rocker (8) and pass through supporting rack fixing bolt
(11) and spin-ended bolt (10) is fixed so that gap probe (4) is inserted into surveyed gap and between the both sides in surveyed gap
There are gaps；
In third step (S3), vibrator (6) is opened, two current vortex displacements being located in displacement sensor fixed link (2) pass
Sensor (3) measures the dynamic respond of the gap probe (4).
10. measurement method according to claim 9, it is characterised in that：
In third step (S3), processor is based on the dynamic respond from the eddy current displacement sensor (3) and comes from institute
The vibratory response for stating vibrator (6) is handled, and the processor is based on following formula calculated gap value and to draw gap non-thread
Property force-displacement curve,
Wherein, Xi(w), i=1,2,3,4 indicate that vibrator energized position, two eddy current displacement sensors measure respectively
Dynamic respond between dynamic respond and gap probe and surveyed gap, HLIndicate the frequency response function of gap probe (4), F
(ω) indicates the exciting force of vibrator (6), Fnl(ω) indicates the non-linear force in surveyed gap.
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| CN109724510B (en) * | 2017-10-31 | 2020-09-29 | 湖南大学 | Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing |
| CN110375630B (en) * | 2019-07-23 | 2021-02-09 | 杭州申昊科技股份有限公司 | Adjusting structure of eddy current sensor |
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| CN205808339U (en) * | 2016-06-30 | 2016-12-14 | 西安交通大学 | A kind of opened gap measuring instrument |
-
2016
- 2016-06-30 CN CN201610505130.XA patent/CN105937875B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0833124A3 (en) * | 1996-09-26 | 1999-04-21 | ROLLS-ROYCE plc | Capacitive distance measurement |
| GB2367361A (en) * | 2000-05-15 | 2002-04-03 | Mitutoyo Corp | Vibration type contact sensor with stylus mounted on detector |
| CN101363727A (en) * | 2008-09-05 | 2009-02-11 | 无锡市江益轴承自动化设备有限公司 | Detection device for bearing end-play |
| CN203824515U (en) * | 2014-04-23 | 2014-09-10 | 中国航空动力机械研究所 | Gap measuring device for engine |
| CN204594447U (en) * | 2015-05-21 | 2015-08-26 | 安徽江淮汽车股份有限公司 | A kind of motor turning intermediate shaft reverses gap detection device |
| CN204963826U (en) * | 2015-10-13 | 2016-01-13 | 哈尔滨东安汽车发动机制造有限公司 | Horizontal drunkenness displacement measurement device of engine belt |
| CN205808339U (en) * | 2016-06-30 | 2016-12-14 | 西安交通大学 | A kind of opened gap measuring instrument |
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| CN105937875A (en) | 2016-09-14 |
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